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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
171

Mirror-Text, Adventurous Journey and the Rebirth of a Hero in John Fowles's The Magus

Liu, Fang-jeng 19 January 2006 (has links)
John Fowles¡¦s The Magus, as a metafiction, is designed to criticize the fictional writing in the context of inter-reflexive narrative. More than displaying his innovative writing style, Fowles extends the possibility of fictional writing with the application of spiral structure, allegorical rhetoric and the abundant mythological elements in this book. This thesis sets out to analyze the mirror-text and discuss how such a text reflects the symbolical meaning carried by the mythological symbols within the narrative, which, taken together, reinforce the significance of the hero¡¦s adventurous journey¡Xthe journey as a process of the development of the hero¡¦s personality. To elaborate the narrative strategy of this novel, in the first chapter, I shall discuss the function of the mirror-text and its relation with the primary text. Applying Mieke Bal¡¦s narratological theory to enhance my understanding of the mirror-text, I would bring forth the cumulative effect of the mirror-text. The arrangement of the mirror-text aims to decompose the text by projecting the deficiencies in the primary text. In Chapter Two, I shall, on the one hand, decompose the text by using Vladimir Propp¡¦s method of morphology. On the other hand, after introducing Joseph Campbell¡¦s analysis of mythology, I would discuss the mode and significance of the heroic journey in detail and explore how the motif of mythology structures the narrative of The Magus. After examining the novel both structurally and semantically, in the final part, I would put emphasis on the psychological condition of the hero. Jungian psychological study, which encompasses mythic symbols, would be adapted for illuminating the development of the hero¡¦s personality. The personal development is taken as an analogy in the novel. From the growth of an I-narrator, Fowles takes the novel as not only an aesthetic discourse with which he scrutinizes the reality he perceives but also a mirror upon which the author and the readers are allowed to project their ¡§lack¡¨ onto the ¡§maternal textual body.¡¨ Like the symbolic rebirth of a hero, the author and the text are reborn from the readers¡¦ interpretations.
172

A Novel Inspection of Fiber Post-Weld-Shift in Butterfly Laser Module Packaging

Song, Xing-Jin 21 August 2003 (has links)
Aligning and fixing the fiber and laser device is an important work in butterfly laser module packaging. Assembling these two component by laser welding is to achieve reliable and stable weld joint. However, during the welding process, rapid solidification of the welded region and the associated material shrinkage causes the fiber position moved. The relative movement between fiber and laser is called post-weld-shift(PWS). A few micrometers PWS makes coupled power lost. Therefore, minimizing the PWS between fiber and laser is a key research topic in butterfly laser module packaging. We can correct the PWS minimal by fiber shift inspect. But it has a difficult of space limit in butterfly laser module packaging. In this study, a video camera with image acquisition system was used to measure the PWS. We also used a mirror image to solve the problem of space limited. The PWS inspection result has matched our simulation. This method can successfully inspect the PWS in butterfly laser module.
173

Taper-Directional Coupler Integrated Rectangular Laser

Yang, Shun-yuan 07 August 2008 (has links)
Semiconductor ring laser diodes (SLD) have been receiving attention for their potential use as source in photonic integrated circuits. Advantages of a ring laser include ease of integration because of no need for cleaved facets and they can be made very compact by folding their cavity . Ring laser have a unique feature, clockwise and counter- clockwise, in their lasing modes. If unidirectional traveling-wave oscillation can be achieved, spatial hole burning effects seen in Fabry-Perot and distributed feedback lasers can be avoided. In this work, the unidirectional oscillation is accomplished by controlling the taper shape structure. The whole laser cavity is formed using four reflection mirrors (TIR) and an output coupler passive waveguide. According to the Beam propagation Method (BPM) simulation, we find that the clockwise and counterclockwise oscillations have different behavior under various taper shape , indicating bidirectional oscillation can be eliminated. Moreover, bending loss¡Bmode transformation and optical gain are all included in calculation model. The waveguide is fabricated in the following steps: (1) ion implantation to get electrical isolation (2) selectively wet etching to form waveguide ridge (3) evaporation n- and p- electrode (4)spatter with Si3N4(5) planarization (6) evaporation microwave transmission line.
174

Toward a Working Theory of Neurorhetorics

Honnold, Jeffrey L. 01 January 2012 (has links)
This piece makes the claim that rhetoric is first philosophy--before philosophy, epistemology, ontology, or any other field--or that rhetoric is, at the least, on equal footing as these fields because: empathy--and thusly the impulse for communication--is physiologically hardwired into humans; special distinctions between human and animal are largely artificial constructions, as is evidenced by neurosciences; "hard" science, in the form of neurosciences, is providing entrance points & opportunities for rhetoric to raise its status within the academy; and said neurosciences, in addition to empathy studies, have shown strong evidence supporting linguistic and evolutionary links between humans and other species, thereby supporting a "preoriginary rhetoricity," in Diane Davis's terms. Davis's Inessential Solidarity... serves as a stepping stone for this piece in the sense that the ethical relation as derived from the work of Levinas, originary rhetoricity, and rhetorics of the saying or of the address require the utmost attention for rhetorical scholars right now. I show how neuroscience research might help Davis's project--in which she is far from alone--move forward by providing connections between rhetoric and current neuroscience work.
175

Optoelectronic packaging and reliability of intra- and inter-board level guided-wave optical interconnection

Choi, Jin Ho, 1968- 04 November 2013 (has links)
We have demonstrated a flexible optical waveguide film with integrated VCSEL and PIN photodiode arrays for the fully embedded board level optical interconnection system. One of the most critical issues in the fully embedded board level optical interconnection system is the signal beam coupling between the guided-wave structure and the aperture of VCSEL (or PIN photodiode). The coupling efficiencies of spherical mirrors are calculated as a function of mirror radius. The optimum mirror radius ranges which are compatible with the fully embedded board level optical interconnection system are theoretically verified. The thermal characteristics of a thin film VCSEL are studied both theoretically and experimentally. The thermal resistances of VCSEL with variable thickness, ranging from 10 [mu]m to 200 [mu]m, have been determined by measuring the output wavelength shift as a function of the dissipated power. The thermal simulation results agree reasonably well with experimentally measured data. From the thermal management point of view, a thinned VCSEL has an exclusive advantage due to the reduction of the thermal resistance. The thermal resistance of 10 [mu]m thick VCSEL is 40 % lower than that of 200 [mu]m thick VCSEL. The theoretical analysis of thermal via effects is performed to determine optimized thickness ranges of thin film VCSEL for the fully embedded structure. Thermal resistance of the fully embedded thin film VCSEL with closed and open thermal via structures are also evaluated with the suitable VCSEL thickness reported. The high-performance computing system is demonstrated using a 16-channel optical backplane using thin film volume holographic gratings. The optical backplane contains TO-46-Can-packaged VCSELs and photodiodes as an optical transmitter and receiver, respectively. Optical packaging plates are fabricated for 4 X 8 array packaging for 16-VCSELs and 16-Photodiodes. Packaging issues including crosstalk and alignment tolerance are studied to design a low cost optical packaging scheme. Thin film volume hologram grating is fabricated on glass substrate to redirect light beams. An individual single channel performs at a 100 MHz data transfer rate. The high-performance computing system using 16-channel optical backplane is demonstrated at a 1.6 Gbps data transmission. / text
176

Tropical theta functions and log Calabi-Yau surfaces

Mandel, Travis Glenn 01 July 2014 (has links)
We describe combinatorial techniques for studying log Calabi-Yau surfaces. These can be viewed as generalizing the techniques for studying toric varieties in terms of their character and cocharacter lattices. These lattices are replaced by certain integral linear manifolds described in [GHK11], and monomials on toric varieties are replaced with the canonical theta functions defined in [GHK11] using ideas from mirror symmetry. We classify deformation classes of log Calabi-Yau surfaces in terms of the geometry of these integral linear manifolds. We then describe the tropicalizations of theta functions and use them to generalize the dual pairing between the character and cocharacter lattices. We use this to describe generalizations of dual cones, Newton and polar polytopes, Minkowski sums, and finite Fourier series expansions. We hope that these techniques will generalize to higher rank cluster varieties. / text
177

Predicting the Hydrodynamic Acoustic Signature of CFAV Quest in the Near Surface Environment

Doyle, Robert 21 September 2012 (has links)
Three models for the generation and propagation of hydrodynamic noise near the ocean surface are presented, and are compared for their ability to predict hull noise generated by CFAV Quest. The simulated fluctuating pressure field on the hull is also validated against experimental results. The near field flow is first solved using the NWT CFD package, and the hydrodynamic noise is calculated using the Lighthill-Curle acoustic analogy. The far field sound is obtained using three methods: a method of images solution to the Lighthill-Curle equations, a simple source model of the transmission loss, or a normal mode model of the transmission loss. Both the simple source and method of images models improve the SPL predictions of the Lighthil-Curle equations. Best performance is obtained from the method of images, improving predictions by approximately 40 dB. The normal mode model is shown to give poor results, due to assumed sea-floor boundary conditions.
178

Reflections of self : the mirror image in the work of Virginia Woolf

Sandison, Jennifer Madden January 1988 (has links)
No description available.
179

Highly Linear Current to Delay converter and its application in ADC design

Thulukkameetheen, Mohideen Raiz 23 January 2014 (has links)
In this work a low voltage and highly linear current-mode current to delay (CTD) converter is presented. The proposed current to delay converter has the improved linearity of about 23.5% when compared with a conventional–delay inverter over the input dynamic current range of 50µA. When used as front-end block in current-mode delay-mode analog to digital converter an 11-bit resolution is obtained. The design is implemented in TSMC 90 nm CMOS technology. Monte Carlo analysis and process corner analysis is performed on the proposed circuit to analyze the amount of mismatch that will degrade the performance of the circuit in a system level. A Process, Voltage, and Temperature (PVT) variation insensitive circuit is used to bias the designed CTD converter to obtain 57% reduction of variation when compared with the simple current mode biasing technique.
180

Distributed H∞ Control of Segmented Telescope Mirrors

Ulutas, Baris 12 August 2014 (has links)
Segmented mirrors are to be used in the next generation of the ground-based optical telescopes to increase the size of the primary mirrors. A larger primary mirror enables the collection of more light, which results in higher image resolutions. The main reason behind the choice of segmented mirrors over monolithic mirrors is to reduce manufacturing, transportation, and maintenance costs of the overall system. However, segmented mirrors bring new challenges to the telescope design and control problem. The large number of inputs and outputs make the computations for centralized control schemes intractable. Centralized controllers also result in systems that are vulnerable to a complete system failure due to a malfunction of the controller. Distributed control is a viable alternative that requires the use of a network of simple individual segment controllers that can address two levels of coupling among segments and achieve the same performance objectives. Since segments share a common support structure, there exists a coupling among segments at the dynamics level. Any control action in one segment may excite the natural modes of the support structure and disturb other segments through this common support. In addition, the objective of maintaining a smooth mirror surface requires minimization of the relative displacements among neighbouring segment edges. This creates another level of coupling generally referred to as the objective coupling. This dissertation investigates the distributed H∞ control of the segmented next generation telescope primary mirrors in the presence of wind disturbances. Three distributed H∞ control techniques are proposed and tested on three segmented primary mirror models: the dynamically uncoupled model, the dynamically coupled model and the finite element model of Thirty Meter Telescope (TMT) project. It is shown that the distributed H∞ controllers are able to satisfy the stringent imaging performance requirements. / Graduate / 0548

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